A protective cover and an electronic device having it are provided. The protective cover for receiving and protecting at least part of an electronic device includes a first case frame comprising a mounting surface for mounting the electronic device, a second case frame for forming an exterior of the protective cover by combining with the first case frame, and at least one electronic component interposed between the first case frame and the second case frame and electrically connected to the electronic device. Thus, the electronic device can be protected from an external impact or a foreign substance, and various additional functions can be performed in aid of the electronic device.